Forming machine



C. M. BREHM.

FORMING MACHINE.

3 SHEETS-SHEET 2.

ATTORNEY UNITED STATES PATENT OFFICE.

CHARLES H. BREHM, OF DAYTON, OHIO.

FORMING MACHINE.

Application filed January 8, 1921. Serial No. 435,977.

To all whom it may concern: I

Be it known that 1, CHARLES M. BREHM, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Forming Machines, of which the following is a speci-. fication, reference being had therein to the accompanying drawing. j

My invention relates to machines for trimming formed articles, and in particular to a punch and die.

The object of my invention is to provide means for holding the blank while it is being trimmed by the punch and die. This is .of particular advantage when used in connection with a punch and die construction 1n whlch the members have a relative move- 'ment with one another as in a trimming die and punch construction. 4 In this lateral movement, due to the trimming action, it is essential that the blank be held in position to'prevent its displacement. The object of my present invention is to efiect this result.

It is my object to be able to trim various objects with the trimming die of my United States Patent No. 1,304,151, and still hold the blank from movement due to the movement of one of the members of the punch and die construction, and due to the shifting in position of one of the members as the cam surfaces on the member pass over one another.

Referring to the drawings: 7

Fig. 1 is a top plan view of a punch;

Fig. 2 is a sectional view of the die with the blank in position prior to trimming.

Fig. 3 is a side elevation of a punch;

Fig. 4 is a section of another form of punch; and,

Fig. 5 is a side elevation of a punch with a laterally movable positioning member held on the top thereof.

Referring to the drawings, and in particular to Figures 1, 2 and 3, 1 is a supporting member or supporting base on which 'is mounted a cam member 2, fastened to the supporting base by a pin 3. This member 2 has a cam surface 3 which will co-o erate with the cam surface 4, to effect the shlfting of the die member 5. It will bevobserved that .1 (Figure 2) has an annular opening 6 in which 5 travels, guided by the pin or guide rod 7. There is a plate 8 cut away as at 9 to permit of the lateralmovement' of the guiding pin 7. Between the member 5 and the plate 8 is a spring 10 surrounding the guide pin 7. 11 is a suitable supporting member having within it a chamber 12 in which the blank 13 rests. Upon the bottom of this chamber 12 are the pins 14 mounted in guide ways 15 These guide ways 15 are placed in an adjustable member '16 within a collar 17 which is attached by the bolt 18 to 5. This collar and a portion of 5 and 11 form the'side walls of the chamber 12' while the bottom is formed principally by 16. There is a plunger head 17 ac- .tuated by a plunger 18 that is pushed upwardlyby a spring 19 surrounding it. A cross member at the end of the plunger 18 is found at 20 which comes in contact with the shoulder 21 of the cylindrical member 22, thus limiting the upward movement of the pin 18 under the influence of the sprin 19. The unrestricted upward movement 0 18 will lift 17 and consequently the blank 13 above the position in which the blank is shown in Figure 2.

The object of the combination of the mechanism shown in Figure 2 and the punch shown in Figure 3 is to effect a trimming of the surplus edge portion 23 of the blank 13. This is effected by movement of the blank in this particular instance laterally as well as vertically so that between the edge 24 and the edge 25 of the punch 26 this surplus shoulder of the blank 13 will be sheared ofi.

To prevent any movement of the blank during this shearing process as the punch and die are moving relative to one another, I have provided means of holding the blank in position despite this relative movement.

Thismeans consists of, inthe embodiment shown in Figure 3, a plate, or, if desired, any

desired plurality of pressure members 27,

whose outward movement is restrained because, of the pins 28 traveling in the slots 29 of guiding pins 30. Guiding pins 30 are surrounded by helical springs 31 having their outer ends abutting against the bottom of the plate 27 pushing it outwardly and their inner ends abutting against the plate 32 which carries the pins 30. The plate 27 is also cut away at 33 to permit of some lateral movement of the plate with respect to the guiding pins 30. The punch and dle are guided with respect to one anotherby any well-known means such as the and its corresponding giudmgv pin 34, way 35.

' ing operation.

The pins 14 serve to limit the downward movement of the blank with respect to the bottom of the chamber or pocket 12 in which it is placed so that in case there is any dirt or fine particles that have accumulated in, the bottom of this chamber the position of the blank will not be disturbed as these particles are likely to be of lesser height than the height. of the pins 14.. When the spring pressed plate comes down' or is pushed up according to the arrangement of the press, it is placed within the blank 13 and holds the bottom of the blank between its plate 27 and the head 17 which is spring pressed outwardly, thus firmly holding the blank despite the relative movement of the punch and die during the shear- As the plate 27 or any similar compression member is of lesser size than the surface on which it makes contact with the blank, there can be no lateral shifting between the blank and the compression .member without disturbing the function that the compression member is to serve, namely, to. hold the blank in osition while the shearing operation is taking place, but

the compression member rocks with the.

movement of the blank.

In Figure 3, the blank, is shown in dotted position in which it would be at the time It makes no material difference whether the punch be stationary and the die moved, or vice verse. I have only shown this particular embodiment because it is a clear illustration of my invention and I do not want to be limited to any particular physical embodiment of it.

In Figure 4, for instance, I have disclosed another form of punch where the limit within which the work is to be done necessitated the spring pressed. member 27 to be actuated by a supplementary guiding pin36, which was joined to 27 by cross'pin37. The supplementary pin is spring pressed by the spring 38 encased in the pocket '39 of a sup-- porting member 40.

In this construction, as in the other construction, there is a pin 41 which has its face ground off level with the face of the punch my invention in a condition where it is desired to trim the e%ge of a stamping such as a knife handle. he spring held member 42, having the configuration of the stamping, fits within it and is-adapted to move with it laterally while the die 25 shears edges of the fish-shaped blank to form onehalf of a knife handle so that while there is a movement between the punch 25 and the die which might, in some instances, result in the movement of the blank. The blank is steadied in position by this supplementary member 42 which is spring-held in position by the springs 43 and 44. These springs are attached to the forming member 42 at 45 and to the supporting member of the die at 46.

Throughout will be'seen that I have provided in combination with my trimming mechanism, a means of holding the blank in position while the trimming is taking place, despite the relative shifting of the punch and die.

While I have shown and described certain features as constituting my invention, it will be understood that parts have been shown for purposes of illustration only, and that I do not desire to be limited to such details, as obvious modifications will occur to a person skilled in the art. 7

Having thus fully described my-invention, what I claim as new and desire to secure by Letters Patent, is i I 1. In combination, a punch and die adapted to move relative to one another vertically and laterally to effect the trimming of a blank, yielding means to hold in position said blank while the trimming operation is taking place, said means being located apart from the. portions to be severed being in engagement with the main portion of the article being trimmed and means to limit the relative vertical movement of the punch and die with respect .to one another.

2. In combination, a punch and die, means in the element of the combination support- .ing the blank to prevent the blank from being upset in its position by foreign materialand means to hold said blank in position during the relative movement of the punch and die when the trimming of the blank is taking place. I 3. n combination, a punch-and d1e, means in the element of the combination supportbeing upset in its position by foreign material, means to hold said blank in position during the relative movement of the punch and die when the trimming of the blank is taking place, and means to limit the relative vertical movement of said punch and die.-

4. In combination, a punch, a member superimposed thereon, means to limit the movement outwardly of the superimposed member, yielding means to malntain saidv member in its outermost position, a die, means of maintaining said die in its outer most position, means of moving laterally said die when in en agement with said punch, whereby a blan in said die will be engaged b said spring-held member on the punch an held in position while the blank is being trimmed by the punch. and die.

limit the movement outwardly thereof, yielding means to maintain said member 1n its outermost position, a die, means of maintaining said die in its outermost position, means of moving laterally said die when in engagement with said punch, a yielding means the spring pressed means on the punch, whereby a blank in said die will be engaged by said spring-held member on the punch and held in'position While the blank is being trimmed by the punch and die.

6. In a punch, a yielding positioning and retaining member mounted on the face thereof adaptedto rock relative to its sup port to conform to the movements of the blank laterally and verticallywhile maintaining the blank in its position to be worked upon, means to maintain said positioning member in engagement with the face thereof, adapted to permit of the lateral movement on the face of the punch of said positioning means whereby when a punch and die are brought together, the lateral movement of the punch and die during a trimming operation will not disturb the positioning of the blank'being trimmed.

7 In a punch, a yielding positioning and retaining-member mounted on the face thereof adapted to rock relative to the supportto conform to the movements of the blank,

- laterally and vertically, while maintaining the blank in its proper position to be worked upon, said positioning member having a plurality of contact members making contact with a blank in a plurality of places, means to maintain said positioning member in engagement with. the blank so as to permit of the lateral movement of the blank without completely freeing it from its proper position to be worked upon.

8. In combination, a punch, yielding means thereon to engage with a blank adapted to conform to the minor movements thereof laterally and vertically but to prevent the blankfrom being shifted out of its position to be operated upon, a die, a yielding means in said die to clamp said blank between it and the first mentioned yielding means and means in said die to prevent the upsetting of the blank due to an accumulation of-foreign ,material in saiddie, and means for moving said punch and die relative to one another laterally. and vertically. I

9. In combination, a punch, a member on the face ofsaid punch pivotally retaining a plurality of vertically disposed fingers,

' means supported by and retained by said in the die to clamp the blank between it and fingers at the outer ends thereof,'yield1ng means interposed between the outer member and the inner member surrounding each of i said fingers for retaining said outer member in its outermost position, whereb the outer member may be retained in yielding engagement with the blank while rocking upon its supporting fingers to which it is pivotally connected.

10. In combination, a punch, amember on the face of said punch pivotally retaining a plurality of vertically disposed fingers,

means supported by and retained by said fingers at the outer ends thereof, yielding means interposed between the outer member and the inner member surrounding each of said fingers for retaining said outer member A in its outermost position, and yielding means cooperating with the first mentioned yield ing means, said second yielding means being carried by a die, whereby the blank while being worked upon will be held between said yielding means.

11. In a punch, 'means normally flush with -the surface thereof for engaging and retaining a blank-and means connected therewith removed therefrom for moving said retaining means into engagement with said blank,

and yieldinglfy holding it inengagement c therewith, said yielding means being located outside of the punch and remote therefrom.

12. In combination, a punch, a supplementary member on the face thereof adapted to conform to the configuration of a blank,

the edges of which are adjacent the edges of the'punch, said supplementary member being adapted to slide on the face of the punch and yielding meansto retain said supplementary member on the face of the punch as it moves laterally thereon, together with the blank, whereby said blank is maintained in position while its edges are being trimmed.

In testimony whereof I afiix m si ature. 7 CHARLES M. R HM. 

